Win twenty team battles to unlock the Elephant Pool arena in versus mode.

Press Down, Down, Up, Down, Left, Right, Down, Up, Up, Up, Right, Left, X

Press Left, X, Up, Y, Right, B, Down, B

Win one hundred arena battles to unlock the Metal Age arena in versus mode.

At the team fighter creature select screen press L, L, Down, Down, Black, White, Black, White, R, L, Black, R, R, R, White s

At the creature select screen in versus mode press L, L, Down, Down, Black, White, Black, White, R, L, Black, R, R, White